Article
Chemistry, Multidisciplinary
Hongmei Zhao, Na Bai, Qian Zhang, Ying Wang, Wenjing Jiang, Jianjun Yang
Summary: In this study, a multilayer coating was designed to provide slow-release antibacterial properties while maintaining cytocompatibility. The coatings demonstrated high hydrophilic performance, low cytotoxicity and can potentially be used in dental applications.
Article
Chemistry, Applied
Zhewei Huang, Sulin Chen, Qiang Lin, Bin Shen
Summary: In this study, a mussel-inspired composite film consisting of mussel protein and graphene/phenol-formaldehyde resin composites is developed to protect Ti-6Al-4V alloys from corrosion and wear. The designed films significantly enhance impedance modulus and reduce corrosion rate, demonstrating long-term corrosion resistance to salt fog.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Multidisciplinary
Richard Bright, Andrew Hayles, Jonathan Wood, Neethu Ninan, Dennis Palms, Rahul M. Visalakshan, Anouck Burzava, Toby Brown, Dan Barker, Krasimir Vasilev
Summary: Inspired by natural topography on insect wings, researchers explored replicating these nanostructures on biomaterials to reduce implant-associated infections. They discovered that hydrothermal etching can create nanoscale protrusions on titanium surfaces, with different etching times and cation choices affecting the bactericidal properties. The study suggests that bactericidal titanium surfaces can be optimized for specific pathogens.
Article
Chemistry, Physical
Francesca Gamna, Amanda M. Wiecek, Andrea Cochis, Jacopo Barberi, Alessandro C. Scalia, Lia Rimondini, Silvia Spriano
Summary: This study aims to couple a chemically treated Ti6Al4V surface with alpha-TP to confer local antibacterial activity for orthopedic and dental prosthetic devices. The coating of alpha-TP resulted in a continuous and homogeneous surface with hydrophilicity and effective antibacterial behavior. On the other hand, the functionalized surface showed poor antibacterial properties and hydrophobic behavior. Cytocompatibility evaluation demonstrated that the coating treatment was more compatible with human mesenchymal stem cells compared to the functionalization.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Deepak Sharma, Somashekhar S. Hiremath, Nagesha Bommanahalli Kenchappa
Summary: In this study, the porous structure of Euplectella aspergillum has been used as a model to mimic mechanical metamaterial. The metamaterials were fabricated using a selective laser melting process and tested under compressive loading conditions. The effect of heat treatment on the mechanical behavior and microstructure was also investigated. The results showed that heat treatment increased the ductility of the metamaterial due to the formation of beta-Ti phase and a decrease in residual stresses. Finite element simulation demonstrated that diagonal struts in the E. aspergillum-based metamaterial prevented global buckling and improved the strength by uniformly distributing the load.
MATERIALS TODAY COMMUNICATIONS
(2022)
Review
Materials Science, Multidisciplinary
Guijiang Wei, Meiying Tan, Shokouh Attarilar, Jie Li, Vasilievich Vladimir Uglov, Binghao Wang, Jia Liu, Lu Lu, Liqiang Wang
Summary: Titanium and its alloys, especially Ti-6Al-4V, are widely used in biomedical fields for implant applications due to their favorable properties. However, the current performance of Ti-6Al-4V alloy is not sufficient to meet the growing clinical requirements, and surface modification alone is not enough for improving implant efficiency. This paper focuses on surface modification methods and the structural influence of the cellular structures to achieve more compatible materials with stable and long-term effective use in biomedical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Haiyang Fan, Chengcheng Wang, Yujia Tian, Kun Zhou, Shoufeng Yang
Summary: This study investigated the feasibility of using L-PBF to fabricate two Ti-6Al-4V-based bimetals, Ti-6Al-4V/γ-TiAl and Ti-6Al-4V/Ti-6242, which may have great potential for the future manufacturing of aerospace components. The bimetal Ti-6Al-4V/γ-TiAl was unsuccessfully built due to the intrinsic cold cracking of γ-TiAl processed by L-PBF. In comparison, the bimetal Ti-6Al-4V/Ti-6242 was successfully manufactured by L-PBF with a solid and defect-free interface.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Duo Xu, Tianyu Wang, Zhiyuan Lu, Yuanqi Wang, Bin Sun, Shudan Wang, Qiang Fu, Zhenggang Bi, Shuo Geng
Summary: The new alloy Ti-6Al-4V-5Cu demonstrated better cell viability and corrosion resistance compared to Ti-6Al-4V, showing prominent antibacterial ability. The main antibacterial mechanism was contact sterilization via extensive precipitation of Ti2Cu.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Camilla Ronchei, Sabrina Vantadori
Summary: A new analytical approach combining the multiaxial high-cycle fatigue criterion and the Critical Distance Theory has been proposed for assessing the fatigue lifetime of notched components. The accuracy of this approach was evaluated using experimental data on severely notched specimens made of Ti-6Al-4V material, which is of significant interest to industries like biomedicine.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Materials Science, Multidisciplinary
Byeong-Seok Lim, Sang-Gyu Lim, Han-Cheol Choe
Summary: This study investigated the precipitation of bone-like apatite on plasma electrolytic oxidation (PEO)-treated Ti6Al-4V alloys with different electrolyte compositions. Various characterization techniques were used to observe the surface morphology, composition, and microstructure of the samples. It was found that the PEO-treated alloy surface in the electrolyte containing Ca, P, Mn, Sr, Zn, Mg, and Si ions was covered with precipitates in a ring pattern around the pores. The Mn ions were detected in the pores and played a role in the formation of MnO2 and Mn2O3. Apatite nucleation occurred in the pores after treatment in a simulated body fluid (SBF) solution, resulting in the formation of larger precipitates.
Article
Materials Science, Multidisciplinary
Jinwoo Kim, Dylan Hall, Haoxue Yan, Yitong Shi, Sudha Joseph, Sarah Fearn, Richard J. Chater, David Dye, C. Cem Tasan
Summary: It was found that roughening the surface of Ti-6Al-4V can significantly reduce hydrogen uptake and enhance its resistance against hydrogen embrittlement.
Article
Engineering, Multidisciplinary
TianYu Liu, Shuang Zhang, Qing Wang, XiaoHua Min, Chuang Dong
Summary: This study aims to derive the general composition formulas of dual-phase alpha+beta titanium alloys using the cluster-plus-glue-atom model. The calculations determined that the Ti-6Al-4V alloy unit is composed of 12 alpha-[Al-Ti-12](AlTi2) and 5 beta-[Al-Ti-14](V2Ti) units, in agreement with experimental data. The chemical formulas of the alpha and beta phases explain the characteristics of high temperature near-alpha alloys and high-strength beta-Ti alloys.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Muhammad Ali Khan, Syed Husain Imran Jaffery, Mushtaq Khan, Mansoor Alruqi
Summary: Aerospace alloys are difficult to cut materials due to their low thermal conductivity, high temperature strength, and elevated chemical reactivity. This study aimed to improve the machinability and productivity of these alloys by using cryogenic conditions. The researchers developed a tool wear map under cryogenic conditions and found that cutting speed and feed rate were directly related to the formation of different wear regions. The presence of TiN in the avoidance zone was found to increase the tool chip contact length. The study also observed a decrease in shear angle and an increase in chip compression ratio, leading to elevated cutting zone temperature and wear. The analysis showed that cryogenic media enhanced tool life up to 100% compared to dry conditions. The cryogenic tool wear map emphasized the importance of choosing machining parameters carefully, resulting in an increase in MRR up to 36% and tool life up to 58%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Chemical
Lei Pan, Menglin Wang, Jingling Hu, Pengbo Xue, Huaxin Guo, Lang Zhong, Xiaosa Yuan, Hanqiao Shi
Summary: The adhesive performance between Ti-6Al-4V alloy plates and PEEK can be improved by using sulfonated poly-ether-ether-ketone (SPEEK) as a modifier and pre-treatments such as anodizing and sandblasting. The successful loading of SPEEK on TC4 plates leads to a significant enhancement in interlaminar shear strength, and bonding mechanisms such as mechanical interlocking, molecular entanglement, hydrogen bonding, and enhanced van der Waals forces can be observed.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Article
Nanoscience & Nanotechnology
Polina Metalnikov, Dan Eliezer, Guy Ben-Hamu
Summary: This study found that the susceptibility to hydrogen embrittlement (HE) differs significantly between Ti?6Al?4V alloys prepared by selective laser melting (SLM) and electron beam melting (EBM). The degradation of SLM Ti?6Al?4V in a hydrogen containing environment is likely to occur through hydride formation and cleavage mechanism, while Ti?6Al?4V prepared by EBM is more likely to degrade through hydrogen enhanced localized plasticity (HELP) mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
